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PATENTED DEC 10 E867 y af-J ma, E@

@einen ftent attnt @Hirn n JOHN GROSS AND JOHN O,l TUNIsON, OF DEOATUR.,'ILLINOIs j Letters Patent 72,027, dated December 10, 1867, l

titte Stigttnlettftmt It in tinte Entert-hnelt mit mating pnt nt tttstmt.

TO ALL WHOM I'll MAY CONCERN:

Be it knwn that we, JOHN Gnoss and JOHN C. TUNISON, of Decatur, in thc,county of Macon, and State of Illinois, have invented certain new anduseful Improvements in Cultivators; and we do hereby declarethefollowing to he a full, clear, and exact description of the same,referencebeing had to the accompanying drawings, making apart of thisspecification, in which-J Figure 1 represents a top plan of theeultivator, and Figure 2 represents a longitudinal vertical sectionthrough the same.

Similar letters of reference, where they occurin the separate figures,denote like parts of the machine in both of the drawings.

Our invention consists, first, in the combination-and combined action ofthe two frames, which act together and independent of each other, sothatwhen the ploughs, which areattached to one of the frames, come incontact with any obstruction that might otherwise break or injureithem,'the otherframc will move forward, and

thus relieve the ploughs from the suddenness'of the`ja1; or stoppage.And our invention further consists in the useof a frictional orspring-hook, connected to the tongue or its frame,'by which the twoframes are united, andmade one, as it were, until tho resistanceorpressure on the ploughs exceeds that of the frictional or spring-hook,when the two frames arc separated, and one may remain obstructedy whilstthe other is drawn forward, as will be explained.

To enable others skilled in the art to make and use our invention, wewill proceed to describe the same with reference to the drawings. l n

A is an axle, supported in the two carrying-wheels B B, and upon thisaxle'is firmly tixedia. frame, C, which n we term the back frame, whichcarries the drivers seat D. -There is a second frame, E, which can moveupon thefaxle or back frame, and upon this Asecond frame, which we termthe front frame, arefattached the tongue Fand the ploughs G and H.`These ploughs are pivoted,at their upper ends, to the"front.frame' E,and a chain, a, connected to the front gploughs, passes around a pulley,b, on saidl front frame, and is thenfunted `to the back frame. A rod, c,connects each ot' the rear ploughs with th'c chain,'so.that if anyplough of the series f l or tno pairs-should sti-ikea stone or otherobstruction, it would stop the front frame, and the onward motion of theteam wouldonly draw the rear frame vi'rorward upon the front frame. Upon`the under rear side or end of` the tongue F there is a hook, 2, uponthe shankof which there is a coiled spring, 3, and anut, 4, by whichsaid spring may be regulated. This hook catches upon the cross-bar C ofthe hack frame, and thus unites the two frames. When, however, theresistance upon any one or more ofthe ploughs exceeds the force withwhich the hook holds, it`(the hook) lets go or is released, and then theback frame, through the chains a, will move forward on to the one thusheld back', and this saves the breaking or injuring ofthe ploughs or ofthe machine. When the rear frame has thus been drawn up or forward uponthe other or front framefand the operator desires to put thc machineagain in working condition,'he presses down upon the lever e, whichallows the frames to assume their working positions, and the hook takeson to and holds the two frames together until another obstruction comesin the way, and they again Adetach, and thus prevent breakage. The frontploughs G are hung to abar, d, which, in turn, is attached to pivot'odor swinging arms,j`, upon which footrests,g, are placed,

so thatthc driver, in his seat, may move these front ploughs to eitherside, so as to escape stalks outofline or of "the rows. The dotted andthe red lines, in addition to the black, lines, show all the movingparts in their" two positions.

Having thns fully described our invent-ion, what we claim therein asnew, and desire to secure by Letters-A 1. The arrangement and combinedaction of the two frames, so that when any permanent obstruction comesagainst any of the ploughs, the frames will disconnect, and the backframe ride or move up on the front one, and thus avoid breakage,substantially as described. t t n 2. We also claim a frictionalspring-hook upon the tongue or tongue-frame,for catching and'holdingupon the cross-bar of the rear frame, so that the two frames will notdisconnect untilsthe pressure upon theplougn pr ploughs OXCGCLlS thatfor which the hookhas been adjusted, substantially as described.

K JOHN' GROSS, JOHN c. TUNIsoN.

Witnesses:

ISAAC D. JENNINes, Jos. KAUFMAN.

